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"Leaking Natural Gas Wells Spew Methane, Report Warns"

"Up to 10 per cent of B.C. natural gas wells are leaking and some have become “super-emitters” of methane, which is an environmental and health concern, says a new report.

Wells can leak from their drill holes as gas can travel along gaps and cracks in the cement that is used to plug the hole between the steel pipe and the underground rock surfaces, says the 69-page report authored by three University of Waterloo scientists.

The commonly overlooked problem is potentially a greater environmental and health threat than hydraulic fracturing, says the report."